As it stands the current code breaks BC on decoding when the
serialized string contains \ characters.
For example:
Input PHP 5.2 PHP 5.2
w/patch
------------------------------------------------------------------------
-------------------
s:7:"foo\10b"; foo\10b
error (NULL returned)
s:7:"foo\bar"; foo\bar
error (NULL returned)
s:5:"\\\\\"; \\\\\
error (NULL returned)
Basically any operation involving strings with \ in them, stop
working once the patch is applied.
There is also the performance drawback to consider, which based on a
rudimentary test involving $_SERVER serialization, shows that the new
code is roughly 1/2 slower.
5.2: 0.388
5.2 w/patch: 0.652
Ilia
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